Muhammad Usman (2008-chem-02-B)

Hazard symbols:

Hazard symbols are recognizable symbols designed to warn about

hazardous materials or locations. They appear with different colors,

borders, background & supplemental information in order to signify

the type of hazard.

Hazard signs:

Some of the signs used are shown below…

Sign Name Description

Corrosive substances This symbol is used to show that the

substance is corrosive.

Explosive substances

This symbol is used to show that the

substance is explosive so care should be

taken while handling this.

Flammable substances Substances can catch fire so care is

needed.

Nature Polluting substances Substances that should not be dumped openly to the atmosphere because they

can cause severe damage to it.

Oxidizing substances They can oxidize other things violently

besides them so care should be taken.

Muhammad Usman (2008-chem-02-B)

Toxic substances

A toxic substance means any chemical or

mixture that may be harmful to the

environment and to human health if

inhaled, swallowed, or absorbed through the skin.

Irritating, Noxious substances

Some substances, such as certain oils or dyes, may make acne worse by irritating

the skin. Examples are Sodium lauryl

sulfate, TEA-lauryl sulfate, laureth-4, and lauryl alcohol

Radioactive Substance

Substances emit radiations like alpha,

beta, gamma rays that can cause severe damage to human health.

Bio-hazard

Biological hazards, also known as

biohazards, refer to biological substances that pose a threat to the health

of living organisms, primarily that of

humans.

Warning sign A warning sign indicates a hazard.

Ionizing radiation sign

Ionizing radiation consists of subatomic

particles or electromagnetic waves that are energetic enough to detach electrons

from atoms or molecules, thus ionizing

them. This sign shows that ionizing

radiations are there which will cause severe damage to the human & biological

health.

Non-ionizing radiation sign

Electromagnetic radiation that does not

carry enough energy per quantum to

ionize atoms or molecules but still they

can cause damage to humane health. They include UV, Visible, Infra-red,

Radio & Micro waves.

Muhammad Usman (2008-chem-02-B)

Food irradiation sign The Radura logo, used to show a food

has been treated with ionizing radiation.

Optical radiation

Any electromagnetic radiation in the wavelength range between 100 nm and 1

nm. The spectrum of optical radiation is

divided into ultraviolet radiation, visible radiation and infrared radiation.

Laser hazard sign Sign shows that there are laser radiations.

Poisonous gas

Sign shows that the Gas is poisonous.

Mostly this sign is there on gas cylinders

& containers containing gas.

Miscellaneous danger It is a general symbol to make people aware of danger & be careful about

handling.

Poison symbol

This symbol is used for generally poisonous materials. More specifically it

is also used for different materials with

different modifications.

Flammable liquid Symbol shows that liquid can catch fire

so should be handled with care.

Muhammad Usman (2008-chem-02-B)

Flammable solid Symbol shows that solid can catch fire so

should be handled with care.

Flammable Gas Symbol shows that gas can catch fire so

should be handled with care.

Non-Flammable gas Safety symbol showing that gas is non-flammable.

Harmful material

It should be kept away from edibles

because it can cause harmful effects if

mixed with edibles.

Dangerous when wet

Sign shows that material should be kept

away from water or moisture because it can cause danger if it is wet.

Organic per-oxides Organic per-oxides are dangerous to handle so care should be taken while

handling.

Muhammad Usman (2008-chem-02-B)

Inhalation hazard Material can cause danger if inhaled.

Marine pollutant Material should not be disposed in sea or water reservoirs because they can be

dangerous to marine life.

Auto-ignition symbol Symbol shows that material’s auto-ignition can take place.